Bowden-Smith, Edward Cyril · New York, D. Van Nostrand Company · leaf 41
> PS H>:!O »^ EFFICIENCIES AND RECIPROCATING PUMPS 23 as an independent clear-way multiple valve, as there isneither nut, screw, nor pin that attaches the disc to theseat. The necessity for large inspecting covers for thepurpose of inserting and manipulating tools may beabolished, as the…
Pumping machinery
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